Because the air you breathe out has much more CO2 by volume than the air you’re processing (it diffuses quickly). See my comment elsewhere for a potential way around this, though.
Ah, silly me. Thanks!
Because the air you breathe out has much more CO2 by volume than the air you’re processing (it diffuses quickly). See my comment elsewhere for a potential way around this, though.
Ah, silly me. Thanks!